Officers were called to Mapperley Plains, Arnold on Thursday 12 September 2019 as part of a pre-planned operation.
A 26-year-old man and a 29-year-old woman have been arrested on suspicion of possessing a firearm and possession with intent to supply drugs.
Both remain in police custody.
Officers remain at the scene as Detectives and search teams continue to understand the circumstances.
The force has increased patrols in the area to provide reassurance to the local community.